By bonding surface, the product can be divided into two types: single-sided bonding (S), and double-sided bonding (D).

The product complies with the performance requirements of Q/SKSP 090-2020 Evergreen Modified Sheets for Waterproofing.

This product is widely used in waterproof works of non-exposed layers, underground and indoor works of all kinds of buildings, as well as of open-cut subways, tunnels, pools, and water ditches. It is especially suitable for projects that are not allowed to use open fire.

TUNNEL

SUBWAY

STOREY

SWIMMING POOL

• Safe and environmental-friendly: In the application process, it saves solvent and fuel usage and resources, and avoid environmental pollution and fire hazards.
  

• Good "self-healing" function: The product adopts a special formula, and its self-adhesive layer has a strong self-healing ability, which can make up for the deficiency of only rigid waterproofness in concrete and achieve the double waterproof effect of both rigidity and flexibility.

• Short application period: Wet application is adopted. The product can be used in wet or even unleveled surfaces, without the use of primer. It has a high degree of freedom of application, not affected by the weather, with greater advantages in the rainy season. It is the most powerful "weapon" to guarantee project punctuality.

• Excellent high-strength cross membrane performance: The product has the characteristics of strong puncture resistance, high nail bar tear strength, excellent tear resistance, high elongation, good dimensional stability, strong UV resistance and low temperature resistance.

• Strong adhesion: the unique wet bonding technology, the synergistic effect of physical mortise and tenon and chemical reaction make the membrane effectively form a whole with the building structure, and the bonding is firm. If any local damage occurs to the membrane, the water will be limited in a very small range without channeling.

Substrate  treatment → prepare cement paste → snap the line on substrate and make trial laying → tear off isolation paper at the membrane bottom→ scrape out cement paste → lay membrane → discharge air by rolling →lap sealing edges and seal ends→ finished product maintenance and protection → apply protective and isolation layers.

Substrate treatment: Remove debris, oil stains and sand from the substrate surface, and all stones and mortar bumps protruding from the surface must be cleared. Cleaning work must be carried out at any time during the application process, and the surface should be repaired and leveled. In particular, cement mortar and other attachments on drainage outlets, chimneys and pipe walls should be removed; internal and external corners should be plastered with cement mortar to form arc angles, with a minimum radius of 50mm for internal corners and 20mm for external corners. If there is visible water on the substrate surface, clear it before applying the membrane.

Prepare cement paste: Adopt a cement: water ratio of 2:1 (weight ratio). Firstly pour water into the prepared mixing bucket according to the set ratio, then put cement into the water, soak it for 15-20min. After full soaking, pour out the excess water on the bucket surface, and mix for over 5min with an electric mixer.

Snap the line on substrate and make trial laying: Make reasonable positioning according to the application site condition, determine the membrane laying direction, snap the membrane control line on the substrate, and make trial laying from low to high positions according to the water flow direction.

Tear off isolation paper at the membrane bottom: After trial laying, first cut the membrane to be laid, reversely lay it on the substrate surface (i.e. the isolation paper at the bottom faces upward), and tear off the isolation paper. When tearing, the peeled isolation paper should be kept at an acute angle of 45-60 degrees with the bonding surface to prevent breaking the isolation paper, and keep it in a natural relaxation state as much as possible, but there should be no wrinkles.

Scrape out cement paste: Its thickness will depend on the smoothness of the substrate. It is generally 2-3mm thick. If it is too thin, the optimal bonding effect cannot be achieved. If it is too thick, the cement paste will pile up and crack. Make sure to scrap evenly and compactly. The width of the neat cement paste should be 100mm wider than the long and short sides of the membrane. Ensure flatness     during the scraping process.

Lay membrane: 

(1) roll laying method: align the membrane with the reference line for trial laying, gently cut the isolation paper with a paper cutter at the length of about 5m, pay attention not to scratch the membrane, slowly tear the unlaid membrane isolation paper from the back, and push the unlaid membrane forward along the reference line. Lay the membrane while tearing the isolation paper. After laying, roll back the remaining 5m long membrane from the previous trial laying, and stick it on the substrate using the above method; 

(2) lift laying method: reversely lay the cut membrane on the substrate surface (i.e. the isolation paper at the bottom faces upward), after stripping all the isolation paper of the membrane, scrape and apply the cement paste on the bonding surface of the  membrane and the position to be laid on the substrate surface, and then respectively lift it from both ends of the membrane by two persons, turn it over and lay it on the position to be laid on. The membrane and its adjacent membrane should be overlapped in parallel. When the long and short sides are overlapped, the upper and lower membrane overlapping isolation membrane should be removed.

Discharge air by rolling: After the membrane is laid, use a soft rubber plate or roller to scrape from the middle to the other side of the membrane lap direction, discharge the air to make the membrane fully adhere to the substrate surface. When the next membrane is    lapped and pasted, lift the isolation paper at the lap joint of the lower membrane, align the upper membrane with the lap control line and paste it on the lower membrane flatly. Discharge the air to make full sticking.

Lap sealing edges and seal ends: 

(1) lap edges of single-sided adhesive membrane: make parallel laps between membranes whose short sides are adjacent, and use an adhesive tape with cover strip to heat and bond. Adopt heated self-adhesive lapping for the long sides, with a lap width of not less than 80mm. 24 hours after the completion of large-area laying, the lap joint application should be carried out. During laying, clear off mud and dust at the lap joints, and then remove the lap joint isolation films of the upper and lower membranes (no need to tear the isolation membrane for short sides). Use a hot air gun to heat and bond the lap joints; 

(2) lap joints of double-sided adhesive membrane: directly tear the isolation film at the lap joints of the upper and lower membranes. Width of long and short sides: not be less than 80mm.

Finished product maintenance and protection: Set the finished product aside to dry for 24 hours to 48 hours (the specific time depends on ambient temperature. Generally speaking, the higher the temperature, the shorter the time required.) In high temperature weather, the waterproof layer should be protected from exposure to sunlight. It may be covered with sunshade cloth or other articles.

Application of protective and isolation layers: After the membrane is laid and passes inspection, make sure to clean the surface of the waterproof layer and apply the waterproof protection layer according to the design requirements.

• During storage and transportation, products of different types and specifications should be stored separately and should not be mixed. Avoid exposure to sunlight and rain, and ensure good ventilation.

• The storage temperature should not be higher than 45℃, and the membrane stacking height should not exceed five layers when stored horizontally, and in a single layer when stored vertically.

• Avoid tilting or side pressure during transportation, and cover with tarpaulin if necessary.

• Under normal transportation and storage conditions, the product lasts for one year from the date of production.

• Application is strictly prohibited on rainy or snowy days, or in gale weather above Grade 5.

• The application environment temperature should not be lower than 5°C.

• For wet-laid waterproof membranes, make sure to prevent the cement paste from polluting the overlapping parts, and the stubble connecting and abandoning positions should be isolated and protected.

• Reasonable application planning should be made for wet laying. After laying, make sure to avoid trampling back and forth before the cement paste is solidified.

• The above information and suggestions are made based on our experience and are for reference use only. They can't replace the experiments done by customers themselves. As 3TREES and its dealers cannot control the storage, handling and use conditions of 3TREES products after delivery, no quality accidents or economic disputes caused by improper use can be attributed to our suggestions. In all application scenarios, the customer shall be responsible for abiding by the intellectual property rights of third parties.

• Without our consent, technical information shall not be provided for third parties.