Black Knight is Melmart’s eco acoustical underlayment ideal for use under all of our laminate, engineered and solid hardwood. If you are going to be floating the floor, look no further than this underlayment. The value proposition with Black Knight is simple, very high end specifications at a very competitive price point. With this 2 mm pad you will get a full vapour barrier, significant sound absorption qualities, non-allergenic, and approved for use over radiant heat.

 

SPECIFICATIONS

IIC Rating

71

FIIC Rating ( Field Test )

70

STC Rating

67

% of Sound Transmission Loss

70% Over 800hz

Water Resistance

Waterproof (Moisture can not penetrate closed cell membranes)

Thickness

3 mm total

Roll Dimensions

43” High – 9 3/4” Diameter

Roll Weight

18 lbs.

Square Footage per Roll

200 sf

Rolls per Pallet

25 Rolls

TECHNICAL PARAMETERS

Test Item

Method

Unit

L-4000

Tensile Strength

JISK – 6767

Mpa

> 0.12

Elongation at Break

JISK – 6767

%

> 200

Density

JISK – 6767

G/cm3

0.022 – 0.025

Eear Strength

JISK – 6767

N/m

> 850

Compressive Strength

JISK – 6767

Mpa

> 0.035

The change rate of size after heating

JISK – 6767

%

< -3

Permanent deformation after press

JISK – 6767

%

< 5.5

Water absorptivity

JISK – 6767

G/cm3

0.003

Thermal conductivity

JISK – 6767

W/MK

0.035

Alkalinity resistance

No Obvious Change

Salt resistance

No Obvious Change

Oil resistance

No Obvious Change

Acid resistance

No Obvious Change

Combustibility

Auto- extinguishing quality Grade 1

FEB / 2010 / 001 SPC
Floor – Ceiling Assembly – 8” Concrete Slab with suspended gypsum ceiling overlay

Smoke content

20 SDR

Oxygen index

27 OI