Surface preparation: All surfaces should be clean, dry and free from frost, grease and loose materials. When cleaning contaminated substrates, We recommend that propan-2-ol (IPA) is used and allowed to dry prior to the application of the sealant strip. When applying the tape to porous or friable surfaces, it is recommended that the surface be treated with a suitable primer, such as an exterior grade PVA, to seal and stabilise the surface. Application: Remove the filmic release liner and apply the adhesive surface onto the substrate to be sealed. Once applied in place, use a roller to ensure good adhesion to the substrate. Avoid joins in the flashing where possible. Any joints should overlap by at least 120mm, and be made with the uppermost piece overlapping on top of the lower strip, so that any water running down will drain freely over the front surface of the flashing. 

3M Thinsulate Self Adhesive:

Size: 1m x 0.6m (Qty 2) 
Thickness: 21mm
Weight: 183g/m2

This is a High Performance Compressible Acoustic Insulation It fits a wide range of applications where varying thickness is highly desired, such as door trim panels and body side trim panels. The products are uniquely high performance and low density making them ideal for mass reduction applications. The web is composed of 50% polyester staple fibres, and 50% polypropylene fibres. The polypropylene fibres are extremely fine, producing the high-energy absorption characteristic with the low weight. The polyester fibres are added to strengthen the web. The scrim attached to both sides is a 100% polypropylene non-woven fabric. It is conformable to accommodate the irregular spaces behind trim panels, headliners and instrument panels. Fills voids to help reduce unwanted noise from travelling throughout the vehicle. It can be processed by conventional techniques such as die-cutting and heat sealing. Attaching to trim panels is easy with this product, using the attached self-adhesive backing. Not recommended for applications where temperatures will be above 120°C

Thickness: 21mm (SAE J1355 @ 0,002 psi, 14 N/m²)
Surface weight: 183 g/m2 (web and scrim)
Density: 7.7 kg/m3
Flammability: 0mm/min as per FMVSS 302 (DIN75200, ISO 3795 (1976))
Temperature stability: 120°C for 2000 Hours .