Kahrs Installation Items, Combo Underlayment 3538 Non-toxic wood stain finish for

Non-toxic wood stain finish for interior use

It's required by EcoStar for their Goldstar Warranty

Not for concrete slabs with radiant heat

Kahrs only warrants these tongue and groove floating floors if this type of glue is used

provides a patented system of moisture protection reducing mold and mildew

Kahrs Installation Items, Combo Underlayment 3538 Non-toxic wood stain finish forGreat all in one underlayment for moisture protection and sound reduction Khrs Combo Underlayment is a two ply polyethylene film with flexible polystyrene granules sandwiched between to provide a dual moisture barrier with a thickness of 3 mm. It has a compression recovery of 80% (ASTM D1055) without loss of resilience. It also has a good sound rating (ASTM E 90 and E 492, STC = 59, IIC = 59) which means it provides very good sound deadening